Access to Bill Hall/Thunder River Trails is currently okay, however we recommend hikers check on road conditions prior to their hike.

North Bass Trailhead and Point Sublime are usually not accessible by car until late May/early June, in a heavy snow year access may be even later.

Hikers without a permit can stop by the Backcountry Information Center to request a last minute permit. Last minute permits and waitlist numbers are issued by the Backcountry Information Center, located inside the park on the South Rim. The South Rim Backcountry Information Center is open daily, year round, for walk-in visitors from 8 am to noon and 1-5 pm Mountain Standard Time.